Glasnot brought remarkable changes. The government allowed churches to open. It released dissidents from prison and allowed the publication of books by previously banned authors. Reporters investigated problems and criticized officials.
Okayy... Soviet leader who made changes in soviet union? I believe it was Gorbachev. Then there's a quetion that says what kind of changes glasnost bring to the Soviet Union? So I really don't know if it's accurate that Gorbachev made changes.. but it's my best answer, because that's the only leader I've read about. :) HOPEFULL this helps you if it's not too late by now!
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Mikhail Gorbachev
His foreign policy helped bring about an end to the Cold War, while within the Soviet Union he introduced major reforms ( glasnost and perestoika). The downfall of the Soviet Union was a result of long periods of economic depression.
Glasnost .
In the Soviet Union, otherwise known as the Union of Soviet Socialist Republics (USSR).
Glasnost was the new soviet union policy which allowed for more individual freedoms like free speech.
Russia/Soviet Union
Perestroika and Glasnost were attempted by Mikhail Gorbachev to change Soviet Union from Communist to Democratic rule.
The Soviet premier who instituted perestroika and glasnost in an effort to save the Soviet Union from collapse was Mikhail Gorbachev. Perestroika, meaning "restructuring," aimed to reform the Soviet economy, while glasnost, meaning "openness," sought to increase transparency and freedom of expression within the government and society. These policies were introduced in the mid-1980s but ultimately contributed to the dissolution of the Soviet Union in 1991.
Glasnost and perestroika
it contributed to instability to the soviet union making high infilation rates.